Use v2

[e-lo]

Relevant Best Practice text:

All GTFS Realtime feeds should be "2.0" or higher, as early version of GTFS Realtime did not require all fields needed to represent various transit situations adequately.

[barbeau]

Right now we have two errors that are only applied to v2.0 feeds, E048 and E049:

• https://github.com/MobilityData/gtfs-realtime-validator/blob/master/RULES.md#e048---header-timestamp-not-populated-gtfs-rt-v20-and-higher
• https://github.com/MobilityData/gtfs-realtime-validator/blob/master/RULES.md#e049---header-incrementality-not-populated-gtfs-rt-v20-and-higher

...but we don't have any rules that target < v2.0 feeds, which is what this issue is focused on.

I supposed this would be a new rule that would be a warning that flags v1 feeds (as opposed to an error)?

[e-lo]

I supposed this would be a new rule that would be a warning that flags v1 feeds (as opposed to an error)?

Exactly.